Ignore push notifications for hidden sites

[JorgeMucientes]

Use me/notifications/settings/ endpoint to disable notifications for hidden sites and current device.

Request body:

{
    "blogs": [
        {
            "blog_id": 194373765,
            "devices": [{
                "device_id": 58089781,
                "new_comment": false,
                "store_order": false
            }]
        }
    ]
}

[dangermattic]

🚫 Please add a type label (e.g. type: enhancement) and a feature label (e.g. feature: stats) to this issue.